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An eosinophil is a white blood cell involved in controlling infections. The white blood cell is a part of the ^____________ system, while the red blood cells are part of the ____________ system.

A immune, circulatory
B circulatory, respiratory
C immune, respiratory
D circulatory, immune

1 Answer

6 votes

Answer:

A

Explanation: This isn't Physics, but there's your answer.

User RafaelKr
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